Printable Hard Sudoku

Set 1urg8bc. 8 puzzles with an answer key, ready to print.

Hard puzzles start with about 29 givens and need real techniques: pointing pairs, naked pairs and hidden pairs. Paper is a great way to practice them, because you have to keep your own notes honest.

Each free PDF has 8 puzzles, four to a page on US Letter paper, plus an answer key with every solution. Every puzzle has exactly one solution. A new set appears here every day, or you can grab a different set any time.

Puzzles in this set

Hard #1
6 5 8
6
4 9 2
5 7 3
9 7 4
8 2 1 9
2 7 6 1 3
5 8 9 4
4 3 6
Hard #2
3 4 5
3 1
7 2 4 6
3 1 7 5
6 1 4 8
4 5 8 1
8 4 1
2 9
9 6 4
Hard #3
1 4 5
7 3
9 2 3 6
4 7 2
6 9 7
9 2 3
4 9 8
2 6 7 1 4
8 7 6
Hard #4
2 6 7
8 9 3 1 5
4 3 6 2 1
1 2 8 6 4
2
6 8
7
6 2 1 3 7
5 6
Hard #5
6 4 9
4 8
9 1 4 8 5
2 4 7 3
4 8
5 1 2
3 2
2 8
2 6 8 7 3 9
Hard #6
8 6
3 8 6 4 2
9 1
3 7
8 6 9 5 3
2 3
2 5 4 1
6 3 5
7 2 8 9
Hard #7
6 5 7
1 2 6
6 2 1 8
4 7 9
8 9 7 3
3
2 8 3 1 5
4 1 6
1 6 5
Hard #8
9
2 6 4
2 9 7 3
5
5 6 2 3
1 7 3 4 9 6
6 8 3 7 5
1 2
1 8 4

Answers are on the last page of the PDF.

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Techniques for hard puzzles

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